Oxygen (O)vsPromethium (Pm)
Promethium (Pm) has a higher Boiling Point (3,273 vs 90 K), while Promethium (Pm) has a higher Melting Point (1,315 vs 54 K), while Oxygen (O) has a higher Electron Affinity (141 vs 12 kJ/mol).
Atomic Properties
8
Atomic Number
61
16
Atomic Mass
145
2
Period
6
16
Group
3
Physical Properties
1
Density
7
54
Melting Point
1,315
90
Boiling Point
3,273
N/A
Molar Heat Capacity
N/A
Chemical Properties
3
Electronegativity
1
141
Electron Affinity
12
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).